Refer to the exhibit. An engineer is configuring an EtherChannel between Switch1 and Switch2 and notices the console message on Switch2. Based on the output, which action resolves this issue?
A.
Configure more member ports on Switch1.
B.
Configure less member ports on Switch2.
C.
Configure the same port channel interface number on both switches.
D.
Configure the same EtherChannel protocol on both switches.
Protocol on Switch 2 is "-" which means it's been set to use "on", i.e. not LACP (active/passive) or PAgP (desirable/auto). In other words, it's not using the same etherchannel protocol.
1/ The Etherchannel group numbers are locally significant to the appliance and they do not need to match.
2/ EtherChannel modes :
PAgP Mode
LACP Mode
ON Mode
sw2(config-if)#do s runn interface Ethernet0/1
Building configuration...
Current configuration : 153 bytes
!
interface Ethernet0/1
description to_e0/1_SW1
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
channel-group 2 mode on
end
sw2(config-if)#do s etherch su | b Proto
Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
2 Po2(SU) - Et0/1(P)
sw2(config-if)#
far-end in DOWN state:
sw1#sh int po2 | i proto
Port-channel2 is down, line protocol is down (notconnect)
0 unknown protocol drops
sw1#sh int status | i PO2
sw1#sh int status | i Po2
Po2 notconnect trunk auto auto
sw1#show etherchannel summary | b Proto
Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
1 Po1(SD) -
2 Po2(SD) LACP Et0/1(s)
sw1#
solution:
sw2(config-if)#do s runn interface Ethernet0/1
Building configuration...
Current configuration : 153 bytes
!
interface Ethernet0/1
description to_e0/1_SW1
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
channel-group 2 mode on
end
sw2(config-if)#no channel-group 2 mode on
sw2(config-if)#
sw2(config-if)#channel-group 2 mode active
sw2(config-if)#
*Dec 18 19:36:51.084: %LINK-3-UPDOWN: Interface Port-channel2, changed state to up
*Dec 18 19:36:52.087: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel2, changed state to up
sw2(config-if)#
Port channel will still come up using the same etherchannel protocol on both switches - even if the number of ports on each side doesn't match. i.e. Number of ports doesn't need to match.
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